• by admin
• 2024-12-04

Do you know the classification of flame retardant foam sandwich panels?

What does bulk density mean in flame retardant foam sandwich panels?

People in the construction industry should know that rock wool products are made of basalt, dolomite and other materials as the main raw materials. Rock wool products are internationally recognized as the main energy-saving materials in the "fifth conventional energy" for their fireproof and heat-insulating properties. After being melted at a high temperature of more than 1450℃, they are centrifuged into fibers by high-speed centrifugation, and a certain amount of adhesive, dust-proof oil and water-repellent are sprayed at the same time. Through the pendulum method, the cotton is laid in three dimensions for curing and cutting.

Its bulk density is also called weight, which refers to the weight of an object per unit volume. It is often used in engineering to refer to the weight of one cubic meter. The size of the bulk density will affect the quality of the product. For building curtain walls, the bulk density of rock wool is generally between 100-140. If the thickness of the selected product is 50, the recommended bulk density is 120kg/m³. If the bulk density is lower than 120, if it is used for exterior walls, the board surface will be uneven or creases will appear. Because the 5 cm sandwich panel itself is relatively thin, if the bulk density is too low, it will also affect the thermal insulation performance.

The higher the bulk density of the flame retardant foam sandwich panel, the higher the product quality. Therefore, when choosing a sandwich panel, bulk density is one of the quality factors that must be considered.

Why are some flame retardant foam sandwich panels installed unevenly?

When the flame retardant foam sandwich panel is being installed, sometimes it will be installed unevenly due to problems with the quality of the panel or the operation of the workers. The unevenness not only affects the appearance of the panel, but also causes the panel to be not fit enough and is very easy to fall off. Let's understand why some rock wool sandwich panels are installed unevenly:

1. Poor mechanical properties lead to arching.

2. The spacing between purlins is too large, which is easy to produce irregular deflection for rock wool sandwich panels with poor mechanical properties.

3. The surface of the rock wool sandwich panel becomes curved and uneven after various erosions.

4. The force nodes are not well combined, and the panel is displaced and deformed after being stressed.

5. It is easy to deform when encountering climate change.

The above are the reasons why the flame retardant foam sandwich panels are not installed evenly. In fact, the main reason for the uneven installation is that the workers do not control the stress points properly. Therefore, in the installation process, in addition to paying attention to the quality of the panels to meet the requirements, the installation requirements must also be correctly mastered. Only in this way can the use effect of the panels be guaranteed.